TED talks on maths and stats
You probably know about the wonderful TEDtalks online videos that are available on a whole range of subjects, but in case you don't they are well worth checking out.I have recently been contacted by someone at bachelorsdegree.org where they have helpfully highlighted the 20 best maths TEDtalks on a page called 20 Incredible TED Talks for Math Geeks. I found the talk by Peter Donnelly (number 17 on their list) particularly interesting (and enjoyable).
If you want to keep up to date on maths and stats TEDtalks you can of course just put "TED talks on maths and stats" into Google and it will give you the currently available talks. You can also create an e-mail alert to be told about new talks as they are added.